cregit-Linux how code gets into the kernel

Release 4.18 block/partitions/sun.c

Directory: block/partitions
// SPDX-License-Identifier: GPL-2.0
/*
 *  fs/partitions/sun.c
 *
 *  Code extracted from drivers/block/genhd.c
 *
 *  Copyright (C) 1991-1998  Linus Torvalds
 *  Re-organised Feb 1998 Russell King
 */

#include "check.h"
#include "sun.h"


int sun_partition(struct parsed_partitions *state) { int i; __be16 csum; int slot = 1; __be16 *ush; Sector sect; struct sun_disklabel { unsigned char info[128]; /* Informative text string */ struct sun_vtoc { __be32 version; /* Layout version */ char volume[8]; /* Volume name */ __be16 nparts; /* Number of partitions */ struct sun_info { /* Partition hdrs, sec 2 */ __be16 id; __be16 flags; } infos[8]; __be16 padding; /* Alignment padding */ __be32 bootinfo[3]; /* Info needed by mboot */ __be32 sanity; /* To verify vtoc sanity */ __be32 reserved[10]; /* Free space */ __be32 timestamp[8]; /* Partition timestamp */ } vtoc; __be32 write_reinstruct; /* sectors to skip, writes */ __be32 read_reinstruct; /* sectors to skip, reads */ unsigned char spare[148]; /* Padding */ __be16 rspeed; /* Disk rotational speed */ __be16 pcylcount; /* Physical cylinder count */ __be16 sparecyl; /* extra sects per cylinder */ __be16 obs1; /* gap1 */ __be16 obs2; /* gap2 */ __be16 ilfact; /* Interleave factor */ __be16 ncyl; /* Data cylinder count */ __be16 nacyl; /* Alt. cylinder count */ __be16 ntrks; /* Tracks per cylinder */ __be16 nsect; /* Sectors per track */ __be16 obs3; /* bhead - Label head offset */ __be16 obs4; /* ppart - Physical Partition */ struct sun_partition { __be32 start_cylinder; __be32 num_sectors; } partitions[8]; __be16 magic; /* Magic number */ __be16 csum; /* Label xor'd checksum */ } * label; struct sun_partition *p; unsigned long spc; char b[BDEVNAME_SIZE]; int use_vtoc; int nparts; label = read_part_sector(state, 0, &sect); if (!label) return -1; p = label->partitions; if (be16_to_cpu(label->magic) != SUN_LABEL_MAGIC) { /* printk(KERN_INFO "Dev %s Sun disklabel: bad magic %04x\n", bdevname(bdev, b), be16_to_cpu(label->magic)); */ put_dev_sector(sect); return 0; } /* Look at the checksum */ ush = ((__be16 *) (label+1)) - 1; for (csum = 0; ush >= ((__be16 *) label);) csum ^= *ush--; if (csum) { printk("Dev %s Sun disklabel: Csum bad, label corrupted\n", bdevname(state->bdev, b)); put_dev_sector(sect); return 0; } /* Check to see if we can use the VTOC table */ use_vtoc = ((be32_to_cpu(label->vtoc.sanity) == SUN_VTOC_SANITY) && (be32_to_cpu(label->vtoc.version) == 1) && (be16_to_cpu(label->vtoc.nparts) <= 8)); /* Use 8 partition entries if not specified in validated VTOC */ nparts = (use_vtoc) ? be16_to_cpu(label->vtoc.nparts) : 8; /* * So that old Linux-Sun partitions continue to work, * alow the VTOC to be used under the additional condition ... */ use_vtoc = use_vtoc || !(label->vtoc.sanity || label->vtoc.version || label->vtoc.nparts); spc = be16_to_cpu(label->ntrks) * be16_to_cpu(label->nsect); for (i = 0; i < nparts; i++, p++) { unsigned long st_sector; unsigned int num_sectors; st_sector = be32_to_cpu(p->start_cylinder) * spc; num_sectors = be32_to_cpu(p->num_sectors); if (num_sectors) { put_partition(state, slot, st_sector, num_sectors); state->parts[slot].flags = 0; if (use_vtoc) { if (be16_to_cpu(label->vtoc.infos[i].id) == LINUX_RAID_PARTITION) state->parts[slot].flags |= ADDPART_FLAG_RAID; else if (be16_to_cpu(label->vtoc.infos[i].id) == SUN_WHOLE_DISK) state->parts[slot].flags |= ADDPART_FLAG_WHOLEDISK; } } slot++; } strlcat(state->pp_buf, "\n", PAGE_SIZE); put_dev_sector(sect); return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)26744.57%213.33%
Mark Fortescue18330.55%16.67%
Alex Williamson447.35%16.67%
Fabio Massimo Di Nitto376.18%16.67%
Al Viro305.01%426.67%
Linus Torvalds162.67%16.67%
Andrew Morton91.50%16.67%
Alexey Dobriyan71.17%16.67%
Tejun Heo40.67%16.67%
Pete Zaitcev10.17%16.67%
Jeff Mahoney10.17%16.67%
Total599100.00%15100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)27445.14%212.50%
Mark Fortescue18330.15%16.25%
Alex Williamson447.25%16.25%
Fabio Massimo Di Nitto376.10%16.25%
Al Viro304.94%425.00%
Linus Torvalds162.64%16.25%
Andrew Morton91.48%16.25%
Alexey Dobriyan71.15%16.25%
Tejun Heo40.66%16.25%
Jeff Mahoney10.16%16.25%
Greg Kroah-Hartman10.16%16.25%
Pete Zaitcev10.16%16.25%
Total607100.00%16100.00%
Directory: block/partitions
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